This is an ACE Edition with B00RH2XYDO

He wants to forge a new empire, at any cost.
And she's the only one standing in his way.

Professional adventurer Sylvia Thorne just wants to travel through the wilds between cities for a living, but when the governor of Skycity declares war on her home, she must embark on a quest that will determine the fate of the Four Cities forever.

And if she's not careful, it won't be just her life she's risking—but everyone in Meadowcity.

Governor Sorin Greyling of Skycity is obsessed with knowledge. When he discovers the Four Cities' darkest secret, he'll stop at nothing to obtain the knowledge and power that has remained hidden for centuries.

Will Sorin's discovery make him a legendary leader? Or will it drive him down a dark path of destruction?